1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gstquery.h: GstQuery API declaration
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_QUERY_H__
#define __GST_QUERY_H__
#include <glib.h>
G_BEGIN_DECLS
typedef enum {
GST_QUERY_NONE = 0,
GST_QUERY_TOTAL,
GST_QUERY_POSITION,
GST_QUERY_LATENCY,
GST_QUERY_JITTER,
GST_QUERY_START,
GST_QUERY_SEGMENT_END,
GST_QUERY_RATE
} GstQueryType;
/* rate is relative to 1000000 */
#define GST_QUERY_TYPE_RATE_DEN G_GINT64_CONSTANT (1000000)
typedef struct _GstQueryTypeDefinition GstQueryTypeDefinition;
struct _GstQueryTypeDefinition
{
GstQueryType value;
gchar *nick;
gchar *description;
};
#ifdef G_HAVE_ISO_VARARGS
#define GST_QUERY_TYPE_FUNCTION(type, functionname, ...) \
static const GstQueryType* \
functionname (type object) \
{ \
static const GstQueryType types[] = { \
__VA_ARGS__, \
0 \
}; \
return types; \
}
#elif defined(G_HAVE_GNUC_VARARGS)
#define GST_QUERY_TYPE_FUNCTION(type, functionname, a...) \
static const GstQueryType* \
functionname (type object) \
{ \
static const GstQueryType types[] = { \
a, \
0 \
}; \
return types; \
}
#endif
void _gst_query_type_initialize (void);
/* register a new query */
GstQueryType gst_query_type_register (const gchar *nick,
const gchar *description);
GstQueryType gst_query_type_get_by_nick (const gchar *nick);
/* check if a query is in an array of querys */
gboolean gst_query_types_contains (const GstQueryType *types, GstQueryType type);
/* query for query details */
G_CONST_RETURN GstQueryTypeDefinition*
gst_query_type_get_details (GstQueryType type);
G_CONST_RETURN GList* gst_query_type_get_definitions (void);
G_END_DECLS
#endif /* __GST_QUERY_H__ */
|
